Should providers be more accountable?

Quoting the BBC News website, "The way broadband speeds are advertised is misleading and should be changed, a cross-party group of 50 MPs has said. Internet providers are not in breach of current guidelines, even if only 10% of customers can obtain their fastest advertised speed, the group said. The British Infrastructure Group is calling for greater powers to enable consumers to hold providers to account."

My recent problems with Plusnet's broadband service underscore this issue in that it is extremely difficult for me to prove conclusively that the provision is significantly less than advertised. Whenever Plusnet look (and do their tech magic) the line is restored, they it decays again and the process repeats.